Abstract
A subset of drought-induced genes are regulated by the plant hormone abscisic acid (ABA). The currently characterized ABA-induced genes fall into a number of different categories including hydrophilic genes, or genes that are similar to late embryogenesis abundant (lea) genes originally identified in cotton, and those which may be involved in prevention of secondary stresses. An example of the first category is the tomato gene,le25. The deduced gene product maintains a conserved distribution of negatively- and positively-charged amino acids as demonstrated using helical wheel plots. It is proposed that thislea gene product plays a role in the control of solute concentration in the cytoplasm. The tomato gene,le16, is an example of a gene which may be involved in the protection of the plant against secondary stresses. LEI6 is similar to non-specific lipid transfer proteins, and is one of a few that is induced in response to osmotic stresses. It is predicted that this gene product is important in the control of pathogens during stress. It is clear that many additional studies, and new methods are needed, to evaluate the role of drought- induced gene products.
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© 1996 Springer-Verlag Berlin Heidelberg
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Bray, E.A., Moses, M.S., Chung, E., Imai, R. (1996). The Role of Abscisic Acid in the Regulation of Gene Expression during Drought Stress. In: Grillo, S., Leone, A. (eds) Physical Stresses in Plants. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61175-9_14
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DOI: https://doi.org/10.1007/978-3-642-61175-9_14
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